Evaporator Temperature Sensor Inspection

WARNING: This page is about a different car, the 2016 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Inspect the evaporator temperature sensor when it is installed to the A/C unit.

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Remove the following parts:
1. Passenger's side scuff plate (See SCUFF PLATE REMOVAL/INSTALLATION .)
2. Passenger's side front side trim (See FRONT SIDE TRIM REMOVAL/INSTALLATION .)
3. Passenger's side A-pillar trim (See A-PILLAR TRIM REMOVAL/INSTALLATION .)
4. Passenger-side lower panel (See PASSENGER-SIDE LOWER PANEL REMOVAL/INSTALLATION .)
Remove the screw.

Fig 1: Identifying Evaporator Temperature Sensor Side Duct
Courtesy of MAZDA MOTORS CORP.
Remove the side duct.
Remove the duct.
Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Switch the ignition ON (engine on).
Set the fan speed to MAX HI.
Set the temperature control to MAX COLD.
Set to the RECIRCULATE mode.
Turn the A/C switch off.
Close all doors and windows.
Wait for 5 min .
Switch the ignition off.
Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Disconnect the short cord connector.

Fig 2: Identifying Short Cord Connector
Courtesy of MAZDA MOTORS CORP.
Measure the temperature at the blower inlet.
Measure the resistance between the short cord connector terminals E and H.

Fig 3: Identifying Short Cord Connector Terminals
Courtesy of MAZDA MOTORS CORP.
- If the resistance is not as shown in the graph, replace the evaporator and short cord. (See A/C UNIT DISASSEMBLY/ASSEMBLY .)
Fig 4: Evaporator And Short Cord Resistance/Temperature Graph
Courtesy of MAZDA MOTORS CORP.